Ophthalmology: For decades, doctors have put antibiotic ointment in the eyes of newborns to prevent ophthalmia neonatorum, an infection often associated with chlamydia, a sexually transmitted disease. Researchers wondered if povidone-iodine, which we put in eyes before eye surgery and costs pennies, would be just as effective as tetracycline. Looks like povidone-iodine was slightly less effective and was a little irritating to the eye. Round one goes to tetracycline.